Another restriction on the effective action of \(\Omega \)  is provided by the perturbative unitarity [1]}, [2]}, [3]}, [4]} (also see Refs. [5]}, [6]}, [7]}, [8]}, [9]}, [10]}, [11]}, [12]}, [13]}, [14]}, [15]}, [16]}, [17]}, [18]}, [19]}, [20]}, [21]} for an incomplete list for the application of unitarity bounds in Beyond-SM theories). In order to obtain these unitarity bounds, we shall compute amplitudes of \(\mu ^- \mu ^+\)  elastic 2-to-2 scatterings shown in Fig. REF .
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